纯js代码制作的网页时钟特效【附实例】【javascript】

    
 
 
 
 
 
 
 
 
 
 
 
  //oObj input requires that a matrix filter be applied. //deg input defines the requested angle of rotation. var deg2radians = Math.PI * 2 / 360; function MatrixFilter(obj) {   if(!obj.filters)return;  //alert(obj.filters.item(0));  var Matrix;  for(p in obj.filters)  {    if(p=="DXImageTransform.Microsoft.Matrix")Matrix=obj.filters["DXImageTransform.Microsoft.Matrix"];  }  if(!Matrix)  {   obj.style.filter+="progid:DXImageTransform.Microsoft.Matrix()";  }  Matrix=obj.filters["DXImageTransform.Microsoft.Matrix"];  this.equal=function(Matrix2D_x)  {   if(Matrix2D_x.M11)Matrix.M11 = Matrix2D_x.M11;   if(Matrix2D_x.M12)Matrix.M12 = Matrix2D_x.M12;   if(Matrix2D_x.M21)Matrix.M21 = Matrix2D_x.M21;   if(Matrix2D_x.M22)Matrix.M22 = Matrix2D_x.M22;  }    if(arguments[1])this.equal(arguments[1]);    this.Rotate=function(deg)  {   rad = deg * deg2radians;   costheta = Math.cos(rad);   sintheta = Math.sin(rad);   var d=new Matrix2D(costheta,-sintheta,sintheta,costheta);   this.equal(Matrix2D.Mul(Matrix,d));  }  this.RotateTo=function(deg)  {   rad = deg * deg2radians;   costheta = Math.cos(rad);   sintheta = Math.sin(rad);   var d=new Matrix2D(costheta,-sintheta,sintheta,costheta);   this.equal(d);  }  this.RotateAt=function(deg,sx,sy)  {   rad = deg * deg2radians;   costheta = Math.cos(rad);   sintheta = Math.sin(rad);   var d=new Matrix2D(costheta,-sintheta,sintheta,costheta);   var x=sx-Matrix.Dx;   var y=sy-Matrix.Dy;   this.MoveTo(x*costheta+y*sintheta-x,-x*sintheta+y*costheta-y);   this.equal(Matrix2D.Mul(Matrix,d));   }  this.RotateToAt=function(deg,sx,sy)  {   rad = deg * deg2radians;   costheta = Math.cos(rad);   sintheta = Math.sin(rad);   var d=new Matrix2D(costheta,-sintheta,sintheta,costheta);   var x=sx;   var y=sy;   this.MoveTo(x-(x*costheta-y*sintheta),-(x*sintheta+y*costheta-x));   this.equal(d);  }  this.MoveTo=function(sx,sy)  {   Matrix.Dx=sx;   Matrix.Dy=sy;  }  this.toMatrix2D=function()  {   return new Matrix2D(Matrix.M11,Matrix.M12,Matrix.M21,Matrix.M22);  }  this.ZoomBy=function(sx,sy)  {   var d=new Matrix2D(sx,0,0,sy);   this.equal(Matrix2D.Mul(Matrix,d));  }  this.toString=function()  {   return ""+Matrix.M11+" "+Matrix.M12+"\n"+Matrix.M21+" "+Matrix.M22+"\n"  }  //Matrix.SizingMethod='clip to original';  //this.fnSetRotation(30);  //alert(Matrix.M11);  //alert(obj.filters["DXImageTransform.Microsoft.Matrix"]); } function Matrix2D() {  this.M11 = arguments[0]||1;  this.M12 = arguments[1]||0;  this.M21 = arguments[2]||0;  this.M22 = arguments[3]||1;  this.Mul_Matrix2D=function(Matrix2D_b)  {   var r=new Matrix2D();   r=Matrix2D.Mul(this,Matrix2D_b);     return r;   }  this.toString=function()  {   return ""+this.M11+" "+this.M12+"\n"+this.M21+" "+this.M22+"\n"  } } Matrix2D.Mul=function(Matrix2D_a,Matrix2D_b) {  var r=new Matrix2D();  r.M11=Matrix2D_a.M11*Matrix2D_b.M11+Matrix2D_a.M12*Matrix2D_b.M21;  r.M12=Matrix2D_a.M11*Matrix2D_b.M12+Matrix2D_a.M12*Matrix2D_b.M22;  r.M21=Matrix2D_a.M21*Matrix2D_b.M11+Matrix2D_a.M22*Matrix2D_b.M21;  r.M22=Matrix2D_a.M21*Matrix2D_b.M12+Matrix2D_a.M22*Matrix2D_b.M22;  return r;  } var ms=new MatrixFilter(s); var mm=new MatrixFilter(m); var mh=new MatrixFilter(h); var i=1; setInterval("ms.RotateToAt((new Date()).getSeconds()*6+6,69,69)",500); setInterval("mm.RotateToAt((new Date()).getMinutes()*6+6,69,69)",500); setInterval("mh.RotateToAt(((new Date()).getHours()+(new Date()).getMinutes()/60)*30,69,69)",500); //mf.MoveTo(30,70); //mf.ZoomBy(1.5,1.5); //mf.ZoomBy(1.5,1.5); //alert(mf.toMatrix2D()); //alert(Matrix2D.Mul(m2d1,m2d2)); //fnSetRotation(oDiv.filters.item(0),30);