兼容多浏览器的渐变效果

以橙色渐变举个例子如下：

.orange{
    color:white;
    border:1px #e38515 solid;
    background:#fe8d00;
    background:-moz-linear-gradient(top, #feac00, rgba(225, 110, 0, 1)); 
    background:-webkit-gradient(linear, 0 0, 0 bottom, from(#feac00), to(rgba(225, 110, 0, 1)));
    filter:alpha(opacity=100 finishopacity=100 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#feac00,endcolorstr=#ff6e00,gradientType=0); /*IE6、IE7*/
    -ms-filter:alpha(opacity=100 finishopacity=100 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#feac00,endcolorstr=#ff6e00,gradientType=0);/*IE8*/ 
    zoom:1;
}
.orange:hover{
    color:white;
    border:1px #e38515 solid;
    background:#fe8d00;
    background:-moz-linear-gradient(top, #ff6e00, rgba(254, 172, 0, 1)); 
    background:-webkit-gradient(linear, 0 0, 0 bottom, from(#ff6e00), to(rgba(254, 172, 0, 1)));
    filter:alpha(opacity=100 finishopacity=100 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#ff6e00,endcolorstr=#feac00,gradientType=0); /*IE6、IE7*/
    -ms-filter:alpha(opacity=100 finishopacity=100 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#ff6e00,endcolorstr=#feac00,gradientType=0);/*IE8*/
    zoom:1;
}