//jquery plugins 图片自动调整大小
/*********************************
josn: width : 最大宽
height : 最大高
v 1.0
*********************************/
/*********************************
例子:
图片自动调整大小
*********************************/
jQuery.fn.extend({
dongPictureReSize : function(o){
var width=o.width;
var height=o.height;
$.each(this,function(i,n){
var p=$(n);
var w2=100;
var h2=100;
if (width!=null){
w2=width;
}else{
w2=p.attr("width");
}
if (height!=null){
h2=height;
}else{
h2=p.attr("height");
}
var x=0;
var y=0;
var img = new Image
img.src=p.attr("src");
var w=img.width;
var h=img.height;
var we=w;
var he=h;
if (we>w2){
we=w2;
he=(we*h)/w
}
if (he>h2){
he=h2
we=(w*he)/h;
}
we=parseInt(we);
he=parseInt(he);
x=(w2-we)/2;
y=(h2-he)/2;
x=parseInt(x);
y=parseInt(y);
p.width(we);
p.height(he);
p.parent().css({"position":"relative", "display":"block", "width":w2, "height":h2});
p.css({"position":"absolute", "left":x, "top":y});
//
//alert('x:'+x+',y:'+y+',we:'+we+',he:'+he+',w2:'+w2+',h2:'+h2);
});
}
});
