function checkwo(){
var vales = "";
$("#vales").val(vales);
var flag = false;
var bo = true;
$("#data_table").find("tr").each(function(){
$(this).find("td input").each(function(){
if($(this).attr("name")=="rid")
{
vales+=$(this).val()+"&";
}
if($(this).attr("name")=="qty")
{
var qty = $(this).val();
if(qty<0)
{
alert(" The number of firm offers cannot be negative ");
bo = false;
return;
}
if(qty>0)
{
flag = true;
}
vales+=qty+",";
}
});

});
if(bo==false)
{
return;
}
$("#vales").val(vales);
if(flag==false)
{
alert(" Please enter a firm offer ");
return;
}
document.all.sys_submit.click();
}