vjquery

function myAddEvent(obj, sEv, fn)
{
if(obj.attachEvent)
{
obj.attachEvent('on'+sEv, function (){
fn.call(obj);
});
}
else
{
obj.addEventListener(sEv, fn, false);
}
}

function getByClass(oParent, sClass)
{
var aEle=oParent.getElementsByTagName('*');
var aResult=[];
var i=0;

for(i=0;i<aEle.length;i++)
{
if(aEle[i].className==sClass)
{
aResult.push(aEle[i]);
}
}

return aResult;
}

function getStyle(obj, attr)
{
if(obj.currentStyle)
{
return obj.currentStyle[attr];
}
else
{
return getComputedStyle(obj, false)[attr];
}
}

function VQuery(vArg)
{
//用来保存选中的元素
this.elements=[];

switch(typeof vArg)
{
case 'function':
//window.onload=vArg;
myAddEvent(window, 'load', vArg);
break;
case 'string':
switch(vArg.charAt(0))
{
case '#': //ID
var obj=document.getElementById(vArg.substring(1));

this.elements.push(obj);
break;
case '.': //class
this.elements=getByClass(document, vArg.substring(1));
break;
default: //tagName
this.elements=document.getElementsByTagName(vArg);
}
break;
case 'object':
this.elements.push(vArg);
}
}

VQuery.prototype.click=function (fn)
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
myAddEvent(this.elements[i], 'click', fn);
}
};

VQuery.prototype.show=function ()
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
this.elements[i].style.display='block';
}
};

VQuery.prototype.hide=function ()
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
this.elements[i].style.display='none';
}
};

VQuery.prototype.hover=function (fnOver, fnOut)
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
myAddEvent(this.elements[i], 'mouseover', fnOver);
myAddEvent(this.elements[i], 'mouseout', fnOut);
}
};

VQuery.prototype.css=function (attr, value)
{
if(arguments.length==2) //设置样式
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
this.elements[i].style[attr]=value;
}
}
else //获取样式
{
//return this.elements[0].style[attr];
return getStyle(this.elements[0], attr);
}
};

VQuery.prototype.attr=function (attr, value)
{
if(arguments.length==2)
{
var i=0;

for(i=0;i<this.elements.length;i++)
{
this.elements[i][attr]=value;
}
}
else
{
return this.elements[0][attr];
}
};

VQuery.prototype.toggle=function ()
{
var i=0;
var _arguments=arguments;

for(i=0;i<this.elements.length;i++)
{
addToggle(this.elements[i]);
}

function addToggle(obj)
{
var count=0;
myAddEvent(obj, 'click', function (){
_arguments[count++%_arguments.length].call(obj);
});
}
};

VQuery.prototype.eq=function (n)
{
return $(this.elements[n]);
};

function appendArr(arr1, arr2)
{
var i=0;

for(i=0;i<arr2.length;i++)
{
arr1.push(arr2[i]);
}
}

VQuery.prototype.find=function (str)
{
var i=0;
var aResult=[];

for(i=0;i<this.elements.length;i++)
{
switch(str.charAt(0))
{
case '.': //class
var aEle=getByClass(this.elements[i], str.substring(1));

aResult=aResult.concat(aEle);
break;
default: //标签
var aEle=this.elements[i].getElementsByTagName(str);

//aResult=aResult.concat(aEle);
appendArr(aResult, aEle);
}
}

var newVquery=$();

newVquery.elements=aResult;

return newVquery;
};

function getIndex(obj)
{
var aBrother=obj.parentNode.children;
var i=0;

for(i=0;i<aBrother.length;i++)
{
if(aBrother[i]==obj)
{
return i;
}
}
}

VQuery.prototype.index=function ()
{
return getIndex(this.elements[0]);
};

function $(vArg)
{
return new VQuery(vArg);
}