function changeImageHeight(show) {
	if(show == "tall" ) 
		{
		document.getElementById("BKG").style.display = "none";
		document.getElementById("BKG2").style.display = "inline";
	}
	else
		{
		document.getElementById("BKG").style.display = "inline";
		document.getElementById("BKG2").style.display = "none";
		}
}

function revertImageHeight(show) {
	if(show == "normal" ) 
		{
		document.getElementById("BKG").style.display = "inline";
		document.getElementById("BKG2").style.display = "none";
		}
}

function checkFields()
{

if (!document.kgpeval.use_kinase1.checked
&&  !document.kgpeval.use_kinase2.checked)
	{
	alert("Please indicate if you use purified kinase in your research.");
	document.kgpeval.use_kinase1.focus();
	return(false);
	}

if (!document.kgpeval.samples_per_day1.checked
&&  !document.kgpeval.samples_per_day2.checked
&&  !document.kgpeval.samples_per_day3.checked
&&  !document.kgpeval.samples_per_day4.checked)
	{
	alert("Please indicate how many samples you assay per day.");
	document.kgpeval.samples_per_day1.focus();
	return(false);
	}

if (!document.kgpeval.luminometer1.checked
&&  !document.kgpeval.luminometer2.checked)
	{
	alert("Please indicate if you have access to a plate-reading luminometer, or other instrumentation that can detect luminescence.");
	document.kgpeval.luminometer1.focus();
	return(false);
	}
	
if (document.kgpeval.first_name.value == "")
	{
	alert("Please provide your first name");
	document.kgpeval.first_name.focus();
	return(false);
	}
if (document.kgpeval.last_name.value == "")
	{
	alert("Please provide your last name");
	document.kgpeval.last_name.focus();
	return(false);
	}
if (document.kgpeval.institution.value == "")
	{
	alert("Please provide your institution");
	document.kgpeval.institution.focus();
	return(false);
	}
	
if (document.kgpeval.department.value == "")
	{
	alert("Please provide your department");
	document.kgpeval.department.focus();
	return(false);
	}
	
if (document.kgpeval.address1.value == "")
	{
	alert("Please provide your street address");
	document.kgpeval.address1.focus();
	return(false);
	}
if (document.kgpeval.bldg_room.value == "")
	{
	alert("Please provide building and room number");
	document.kgpeval.bldg_room.focus();
	return(false);
	}
if (document.kgpeval.city.value == "")
	{
	alert("Please provide your city");
	document.kgpeval.city.focus();
	return(false);
	}
if (document.kgpeval.state.value == "" && document.kgpeval.compno.value == "10")
	{
	alert("Please provide your state");
	document.kgpeval.state.focus();
	return(false);
	}
if (document.kgpeval.country.value == "")
	{
	alert("Please provide your country");
	document.kgpeval.country.focus();
	return(false);
	}
if (document.kgpeval.zip.value == "")
	{
	alert("Please provide your postal code");
	document.kgpeval.zip.focus();
	return(false);
	}
if (document.kgpeval.phone.value == "")
	{
	alert("Please provide your telephone number");
	document.kgpeval.phone.focus();
	return(false);
	}
if (document.kgpeval.email.value == "")
	{
	alert("Please provide your email address");
	document.kgpeval.email.focus();
	return(false);
	}
if(document.getElementById('permission').checked == false)
		{
		alert("Please give us permission to contact you");
		
		document.getElementById('permission').focus();
		return(false);
		}	
// var reg = new RegExp("@");
// see alpha/0_webprod/regexp/
var reg = new RegExp("^([a-zA-Z0-9-._]+)@([a-zA-Z0-9-._]+.)[a-zA-Z]{2,4}$");
if (!reg.test(document.kgpeval.email.value))
	{
	document.kgpeval.email.focus();
	if (confirm("This email does not appear to be correct --> " + document.kgpeval.email.value + ".   To change the address, select OK.  If you are certain it is correct, select CANCEL."))
		{
		return(false);
		}
	return(true);
	}
return(true);
}	

function PromegaActivateTabA(tabNum)
{
var i, divName, CurrentTab;

CurrentTab = "tab" + tabNum;

			
   			for(i=0; i<=4; i++)
   			{ 
   					divName = "tab" + i;
   					
     				if(divName == CurrentTab) 
     			{
       				document.getElementById(CurrentTab).style.visibility = "visible";

       			}
     				else 
     			{
					document.getElementById(divName).style.visibility = "hidden";
   				}     
			}	
}

function PromegaSwitchTabColorA(tabNavNum)
{
var i, divNameNav, CurrentTabNav;

CurrentTabNav = "TabNav" + tabNavNum;


			
   			for(i=0; i<=4; i++)
   			{ 
   					divNameNav = "TabNav" + i;
   					
     				if(divNameNav == CurrentTabNav) 
     			{
       				
       				document.getElementById(CurrentTabNav).style.backgroundColor = "#0167BB";
       				document.getElementById(CurrentTabNav).style.borderLeft = "1px solid #fff";
       				document.getElementById(CurrentTabNav).style.borderRight = "1px solid #fff";
       				document.getElementById(CurrentTabNav).style.borderBottom = "1px solid #BED73E";
       				document.getElementById(CurrentTabNav).style.color = "#FFFFFF";

       			}
     				else 
     			{
					
					document.getElementById(divNameNav).style.backgroundColor = "#7BA6C9";
       				document.getElementById(divNameNav).style.borderBottom = "0px solid #fff";
       				document.getElementById(divNameNav).style.borderRight = "0px solid #fff";
       				document.getElementById(divNameNav).style.borderLeft = "0px solid #fff";
       				document.getElementById(divNameNav).style.borderTop = "0px solid #fff";
       				
					
   				}     
			}	
}