function searchtime()	{

//check for user browser type, either netscape4.x or other
 if ((navigator.appName  == "Netscape")	&& (parseFloat(navigator.appVersion) >= 4 && 		parseFloat(navigator.appVersion) < 5))	
 		{
			browser = "netscape4x";				
		}
else 
		{
			browser = "allother"	
		}
		
		
//setting the value of the variable newNumber for netscape4x
if (browser == "netscape4x") 
{
	var newNumber = document.BODY.document.form1.page.value;
}
			
//setting the value of the variable newNumber for allother browsers
if (browser == "allother") 
{
		var newNumber = document.form1.page.value;
}	
	
	
//running the timeline search when the user has entered a date into the form
if ((newNumber < 1530) || (newNumber > 2000)) 
			{
			alert("Please enter a date between 1530 and 2000.");
			}
else 
			{
			newUrl = newNumber + ".html";
			window.open(newUrl,'_self');
			}
	
	
	
	
}