function formchk(){
//alert();
if(document.form1.com_name.value==""){
  alert("Company name?");
  document.form1.com_name.focus();
  return false;
  }
if(document.form1.com_caller.value==""){
  alert("Name?");
  document.form1.com_caller.focus();
  return false;
  }  
if(document.form1.com_tel.value==""){
  alert("TEL?");
  document.form1.com_tel.focus();
  return false;
  }
if(document.form1.com_mail.value==''){
			alert("E-mail?");
			document.form1.com_mail.focus();
			return false;
			}
			
if(document.form1.select.selectedIndex!=0){
	if(document.form1.yahoo.value=="" && document.form1.google.value=="" && document.form1.alibaba.value=="" && document.form1.place.value=="" && document.form1.memo.value==""){
        alert("choose an item of source!");
         return false;
  }
         }else{
			alert("choose a source!");
            return false; 
		 }
	
if(!document.form1.com_mail.value==''){		
		if(document.form1.com_mail.value.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) == -1)
		 {
			alert("wrong typr for E-mail!");
			document.form1.com_mail.focus();
			return false;
			}
			}
if(document.form1.select_1.selectedIndex != 0){
	if(document.form1.pcs_1.value=="" || document.form1.l_1.value=="" || document.form1.w_1.value=="" || document.form1.h_1.value==""){
        alert("the "+document.form1.select_1.value+" no data!");
         return false;
  }		
         }
if(document.form1.select_2.selectedIndex!=0){
	if(document.form1.pcs_2.value=="" || document.form1.l_2.value=="" || document.form1.w_2.value=="" || document.form1.h_2.value==""){
        alert("the "+document.form1.select_2.value+" no data!");
         return false;
  }
         }
		 		                 	
}