function validateForm(form)
{
	 if (isBlank(form.SearchCriteria.value))                      
	  {
	    alert("Please enter Search Criteria.")
	    form.SearchCriteria.focus();
		return false;
	    }
}

function isBlank(testStr)
{
	if (testStr.length==0)  // nothing entered
		return true
	for (var i = 0; i <= testStr.length-1; i++)  // all spaces?
		if (testStr.charAt(i) != " ")
			return false
	return true
}