function.js

用Java编写的简易的学生信息管理系统,有涉及到java web等

String.prototype.trim = function()  
{  
	return this.replace(/(^\s*)|(\s*$)/g, "");
};

String.prototype.ltrim = function()  
{  
	return this.replace(/(^\s*)/g, "");  
};  

String.prototype.rtrim = function()  
{  
	return this.replace(/(\s*$)/g, "");  
};  

function checkUserName(){
	validate.sName.value = validate.sName.value.trim();
	if (validate.sName.value.length<3){
		valusername.innerHTML="<font color='red'>姓名至少3个字符！</font>";
		return false;
	}else{
		valusername.innerHTML="<img src='img/yes.gif'>";
		return true;
	}

}
function checkStuNo(){
	validate.sStuNo.value = validate.sStuNo.value.trim();
	if (validate.sStuNo.value.length<1){
		valstuno.innerHTML="<font color='red'>学号不能为空！</font>";
		return false;
	}else{
		valstuno.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function toback(){
	window.history.back();
}
function checksDepartment(){
	if (validate.sDepartment.value.trim().length<1){
		valdep.innerHTML="<font color='red'>科目不能为空！</font>";
		return false;
	}else{
		valdep.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checksSpecialty(){
	if (validate.sSpecialty.value.trim().length<1){
		valspe.innerHTML="<font color='red'>专业不能为空！</font>";
		return false;
	}else{
		valspe.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checkScore1(){
	if(validate.fScore1.value.trim()>100){
		vals1.innerHTML="<font color='red'>成绩1不能大于100</font>"
		return false;
	}else if(validate.fScore1.value.trim().length<1){
		vals1.innerHTML="<font color='red'>成绩1不能为空</font>"
		return false;
	}else{
		vals1.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checkScore2(){
	if(validate.fScore2.value.trim()>100){
		vals2.innerHTML="<font color='red'>成绩2不能大于100</font>"
		return false;
	}else if(validate.fScore2.value.trim().length<1){
		vals2.innerHTML="<font color='red'>成绩2不能为空</font>"
		return false;
	}else{
		vals2.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checkScore3(){
	if(validate.fScore3.value.trim()>100){
		vals3.innerHTML="<font color='red'>成绩3不能大于100</font>"
		return false;
	}else if(validate.fScore3.value.trim().length<1){
		vals3.innerHTML="<font color='red'>成绩3不能为空</font>"
		return false;
	}else{
		vals3.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checkScore4(){
	if(validate.fScore4.value.trim()>100){
		vals4.innerHTML="<font color='red'>成绩4不能大于100</font>"
		return false;
	}else if(validate.fScore4.value.trim().length<1){
		vals4.innerHTML="<font color='red'>成绩4不能为空</font>"
		return false;
	}else{
		vals4.innerHTML="<img src='img/yes.gif'>";
		return true;
	}
}
function checkForm(){
	var b_spe = checksSpecialty();
	var b_dep = checksDepartment();
	var b_no= checkStuNo();
	var b_name = checkUserName();
	var b_s1=checkScore1();
	var b_s2=checkScore2();
	var b_s3=checkScore3();
	var b_s4=checkScore4();
	//alert(b_username && b_password&& b_email&& b_postalcode);
	if(b_name && b_dep&&b_spe&& b_no&&b_s1&&b_s2&&b_s3&&b_s4)
	return validate.submit();

}