js备忘录

生成n位随机数

function MathRand(n){            
    var num=0;            
    for(var i=0;i<n;i++){                
        num += Math.floor(Math.random()*10);            
    }            
    return num;        
}

js获取form表单，并封装成json对象

$.fn.serializeObject = function(){    
    var o = {};    
    var a = this.serializeArray();    
    $.each(a, function() {    
        if (o[this.name]) {    
            if (!o[this.name].push) {    
                o[this.name] = [o[this.name]];    
            }    
            o[this.name].push(this.value || '');    
        } else {    
            o[this.name] = this.value || '';    
        }    
    });    
    return o;    
}; 

$.fn.serializeObject2 = function(attrNum)    
{   
    array = [];    
    record = {};
    a = this.serializeArray();   
    count = 1; 
    $.each(a, function() {
        if(this.name == "id" || this.name == "num" || this.name == "price" || this.name == "total"){
            record[this.name] = parseInt(this.value);
        }else{
            record[this.name] = this.value || '';
        }
        if(count % attrNum == 0){
            array.push(record);
            record = {};
            count = 1;
        }else{
            count++;
        }
    });   
    return array;
};