function validation_list()
{
	
	var list1=document.first.price.value;
	var list2=document.first.brand.value;
	var list3=document.first.promo.value;
	var flag=0;
	if((list1==0)&&(list2==0)&&(list3==0))
	{
		document.getElementById("error_message").style.display='block';
		document.getElementById("error_message").innerHTML="Please select atleast one search option";
		return false;
	}
	else
	{
		document.getElementById("error_message").style.display='none';
		document.getElementById("error_message").innerHTML="Price";
		return true;
		
	}
}