function CheckSuForm()
{
   
    if(document.forms.length > 0)
    {
        document.forms[0].onsubmit = function()
        { 
        var inputed=0;
            var formobj = document.forms[0].elements;
            if(formobj.length > 0)
            {
                for(var i=0;i<formobj.length;i++)
                {
                    if(formobj[i].getAttribute("abs")!=null){
                        if(formobj[i].tagName == "INPUT")
                          {
                            switch(formobj[i].type)
                            {
                                case "text":
                                case "file":
                                    if(Trim(formobj[i].value) == "")
                                    {
                                        inputed=1;
                                    }
                                    break;
                                case "radio":
                                    if(!formobj[i].checked)
                                    {
                                        inputed=1;
                                    }
                                    break;
                            }
                        }
                        if(formobj[i].tagName == "TEXTAREA")
                        {
                            if(Trim(formobj[i].value) == "")
                            {
                                inputed=1;
                            }
                        }
                        
                    }
                    if (inputed==1){
                        alert("请填写必填表单再提交,谢谢!");
                        return false;
              
                    }
                    
                }
            }
            
        }
    }
}