IE6以前で透過pngファイルを背景に使う

div.main{
background:url(img/bg_page.png);
}

* html div.main{
behavior: expression(
this.style.behavior || (
this.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=crop,
src='"+this.currentStyle.getAttribute("backgroundImage").slice(5,-2)+"')",
this.style.backgroundImage = "none",
this.style.behavior = "none"
)
);
}

ノーリピートの時
div.main{
background:url(img/bg_page.png) repeat-y;
}

* html div.main{
behavior: expression(
this.style.behavior || (
this.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,
src='"+this.currentStyle.getAttribute("backgroundImage").slice(5,-2)+"')",
this.style.backgroundImage = "none",
this.style.behavior = "none"
)
);
}