function isNumber(str)  
{   
    if(str.length==0) 
    return  false; 
    for(i =0;i<str.length;i++)
	{   
    if(str.charAt(i)< "0" || str.charAt(i)>"9") 
    return  false; 
    } 
   return  true; 
} 
function isEnglish(str) 
{   
    if(str.length==0) 
    return  false; 
    for(i=0;i<str.length;i++)
    {   
     if(str.charCodeAt(i)>128) 
      return  false; 
    } 
    return  true; 
} 

function isMail(email) { 
 var pattern = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/; 
 if(pattern.test(email)) { 
  return true; 
 } 
 else { 
  return false; 
 } 
}

function checkSearch()
{
	var pro_name=$F("pro_name");
	var pro_leiid=$F("pro_leiid");
	
	   if(pro_name=="" || pro_name=="product name like 'nike'")
	   {   alert("Please input a keyword for search");
		   $("pro_name").focus();
		   return false;
		   }
	   else
	   { 
	       if(!isEnglish(pro_name))
	       {
		       alert("Please input the information in English instead!");
		       $("pro_name").focus();
		       return false;	
		   }
		   else
		   {
			   window.location.href="product_search.asp?pro_name="+pro_name+"&pro_leiid="+pro_leiid;
		   }		   
	    } 		
}