// 前台检测登陆表单填写是否合法
//(填写身份证号和证书编号)
//(判断是否有填写以及是否填写了非法字符)

function search(){ 
if (studentsearch.zjnumber.value==""){
  alert("请输入身份证号!");
studentsearch.zjnumber.focus();
  return false;
 }
var i=studentsearch.zjnumber.value.indexOf("'");
  if(i!=-1){
    alert("身份证号中有非法字符");
	studentsearch.zjnumber.focus();
	return false;
	}
var d=studentsearch.zjnumber.value.indexOf("=");
  if(d!=-1){
    alert("身份证号中有非法字符");
	studentsearch.zjnumber.focus();
	return false;
	}

if (studentsearch.zsnumber.value==""){
 alert("请输入证书编号!");
studentsearch.zsnumber.focus();
 return false;
 }
var z=studentsearch.zsnumber.value.indexOf("'");
  if(z!=-1){
     alert("证书编号中有非法字符");
	 studentsearch.zsnumber.focus();
	 return false;
  }
var s=studentsearch.zsnumber.value.indexOf("=");
  if(s!=-1){
    alert("证书编号中有非法字符");
	studentsearch.txtzsbh.focus();
	return false;
	}   
	document.studentsearch.submit()
}