The technique and method of CSS background gradient

The code for implementing a Web page background gradient with CSS is as follows:
One, from the top down gradient
Example Source Code:
body{
FILTER:progid:DXImageTransform.Microsoft.Gradient (gradienttype=0,startcolorstr= #ffffff, endcolorstr= #000000);
}
Two, from top left to right down the gradient
Example Source Code:
body{
Filter:alpha (style=1,opacity=25,finishopacity=100,
startx=50,finishx= 100,starty=50,finishy=100);
Background-color:skyblue;
}
Third, from left to right gradient
Example Source Code:
body{
FILTER:progid:DXImageTransform.Microsoft.Gradient (gradienttype=1,startcolorstr= #ffffff, endcolorstr= #000000);
}
Four, from the top down gradient
Example Source Code:
Style= "Filter:progid:DXImageTransform.microsoft.gradient (gradienttype=0,startcolorstr=blue,endcolorstr=white);"