check.js

完成图书管理系统的一些简单的功能

//???????????
function check(){
	if (myform.userid.value==""){
		alert("???????!");myform.userid.focus();return;
	}
	if (myform.username.value==""){
		alert("???????!");myform.username.focus();return;
	}
	if (myform.password.value==""){
		alert("?????!");myform.password.focus();return;
	}
	if (myform.password.value.length<1){
		alert("?????6?,?????!");myform.password.focus();return;
	}		
	if (myform.password2.value==""){
		alert("?????!");myform.password2.focus();return;
	}
	if (myform.password.value!=myform.password2.value){
		alert("???????????,?????!");myform.password.focus();return;
	}
	if (myform.email.value!=""){
		var i=myform.email.value.indexOf("@");
		var j=myform.email.value.indexOf(".");
		if((i<0)||(i-j>0)||(j<0)){
			alert("????Email?????,?????!");myform.email.value="";myform.email.focus();return;
		}
	}
	myform.submit();		
}
function check_modi(){
	if (myform.truename.value==""){
		alert("???????!");myform.truename.focus();return;
	}
	if (myform.oldpwd.value==""){
		alert("??????!");myform.oldpwd.focus();return;
	}
	if(myform.holdpwd.value!=myform.oldpwd.value){
		alert("??????????,?????!");myform.oldpwd.value="";myform.oldpwd.focus();return;
	}
	if (myform.pwd.value==""){
		alert("??????!");myform.pwd.focus();return;
	}
	if (myform.pwd.value.length<1){
		alert("??????6?,?????!");myform.pwd.focus();return;
	}		
	if (myform.pwd1.value==""){
		alert("??????!");myform.pwd1.focus();return;
	}
	if (myform.pwd.value!=myform.pwd1.value){
		alert("???????????,?????!");myform.pwd.focus();return;
	}
	if(myform.cardno.value==""){
		alert("?????!");myform.cardno.focus();return;
	}		
	if (myform.email.value==""){
		alert("???Email??!");myform.email.focus();return;
	}
	var i=myform.email.value.indexOf("@");
	var j=myform.email.value.indexOf(".");
	if((i<0)||(i-j>0)||(j<0)){
		alert("????Email?????,?????!");myform.email.value="";myform.email.focus();return;
	}
	myform.submit();		
}
function checkU(myform){
	if(myform.username.value==""){
		alert("??????!");myform.username.focus();return;
	}
	if(myform.PWD.value==""){
		alert("?????!");myform.PWD.focus();return;
	}
	myform.submit();
}

function checkM(myform){
	if(myform.manager.value==""){
		alert("???????!");myform.manager.focus();return;
	}
	if(myform.PWD.value==""){
		alert("?????!");myform.PWD.focus();return;
	}
	myform.submit();
}
function CheckAll(elementsA,elementsB){
	for(i=0;i<elementsA.length;i++){
		elementsA[i].checked = true;
	}
	if(elementsB.checked ==false){
		for(j=0;j<elementsA.length;j++){
			elementsA[j].checked = false;
		}
	}
}
//???????????????,???,???