function trim(str) {
	   str = str.replace(/^\s+/g,""); 
	   str = str.replace(/\s+$/g,""); 
	   return str; 
	}  

	function doSearch(){
		document.forms["search_form"].search.value = trim(document.forms["search_form"].search.value);
		if(document.forms["search_form"].search.value == "")
			return false;
		else
			return true;
	}