0770: // A method for quickly swapping in/out CSS properties to get correct calculations
0771: swap: function( elem, options, callback ) {
0772:   var old = {};
0773:   // Remember the old values, and insert the new ones
0774:   for ( var name in options ) {
0775:     old[ name ] = elem.style[ name ];
0776:     elem.style[ name ] = options[ name ];
0777:   }
0778:
0779:   callback.call( elem );
0780:
0781:   // Revert the old values
0782:   for ( var name in options )
0783:     elem.style[ name ] = old[ name ];
0784: },
0785:

0786: css: function( elem, name, force ) {
0787:   if ( name == "width" || name == "height" ) {
0788:     var val, props = { position: "absolute", visibility: "hidden", display:"block" }, which = name == "width" ? [ "Left", "Right" ] : [ "Top", "Bottom" ];
0789:   
0790:     function getWH() {
0791:       val = name == "width" ? elem.offsetWidth : elem.offsetHeight;
0792:       var padding = 0, border = 0;
0793:       jQuery.each( which, function() {
0794:         padding += parseFloat(jQuery.curCSS( elem, "padding" + this, true)) || 0;
0795:         border += parseFloat(jQuery.curCSS( elem, "border" + this + "Width", true)) || 0;
0796:       });
0797:       val -= Math.round(padding + border);
0798:     }
0799:   
0800:     if ( jQuery(elem).is(":visible") )
0801:       getWH();
0802:     else
0803:       jQuery.swap( elem, props, getWH );
0804:     
0805:     return Math.max(0, val);
0806:   }
0807:   
0808:   return jQuery.curCSS( elem, name, force );
0809: },
0810:

0811: curCSS: function( elem, name, force ) {
0812:   var ret;
0813:
0814:   // A helper method for determining if an element's values are broken
0815:   function color( elem ) {
0816:     if ( !jQuery.browser.safari )
0817:       return false;
0818:
0819:     var ret = document.defaultView.getComputedStyle( elem, null );
0820:     return !ret || ret.getPropertyValue("color") == "";
0821:   }
0822:
0823:   // We need to handle opacity special in IE
0824:   if ( name == "opacity" && jQuery.browser.msie ) {
0825:     ret = jQuery.attr( elem.style, "opacity" );
0826:
0827:     return ret == "" ?
0828:       "1" :
0829:       ret;
0830:   }
0831:   // Opera sometimes will give the wrong display answer, this fixes it, see #2037
0832:   if ( jQuery.browser.opera && name == "display" ) {
0833:     var save = elem.style.display;
0834:     elem.style.display = "block";
0835:     elem.style.display = save;
0836:   }
0837:   
0838:   // Make sure we're using the right name for getting the float value
0839:   if ( name.match( /float/i ) )
0840:     name = styleFloat;
0841:

0842:   if ( !force && elem.style && elem.style[ name ] )
0843:     ret = elem.style[ name ];
0844:

0845:   else if ( document.defaultView && document.defaultView.getComputedStyle ) {
0846:
0847:     // Only "float" is needed here
0848:     if ( name.match( /float/i ) )
0849:       name = "float";
0850:
0851:     name = name.replace( /([A-Z])/g, "-$1" ).toLowerCase();
0852:
0853:     var getComputedStyle = document.defaultView.getComputedStyle( elem, null );
0854:
0855:     if ( getComputedStyle && !color( elem ) )
0856:       ret = getComputedStyle.getPropertyValue( name );
0857:
0858:     // If the element isn't reporting its values properly in Safari
0859:     // then some display: none elements are involved
0860:     else {
0861:       var swap = [], stack = [];
0862:
0863:       // Locate all of the parent display: none elements
0864:       for ( var a = elem; a && color(a); a = a.parentNode )
0865:         stack.unshift(a);
0866:
0867:       // Go through and make them visible, but in reverse
0868:       // (It would be better if we knew the exact display type that they had)
0869:       for ( var i = 0; i < stack.length; i++ )
0870:         if ( color( stack[ i ] ) ) {
0871:           swap[ i ] = stack[ i ].style.display;
0872:           stack[ i ].style.display = "block";
0873:         }
0874:
0875:       // Since we flip the display style, we have to handle that
0876:       // one special, otherwise get the value
0877:       ret = name == "display" && swap[ stack.length - 1 ] != null ?
0878:         "none" :
0879:         ( getComputedStyle && getComputedStyle.getPropertyValue( name ) ) || "";
0880:
0881:       // Finally, revert the display styles back
0882:       for ( var i = 0; i < swap.length; i++ )
0883:         if ( swap[ i ] != null )
0884:           stack[ i ].style.display = swap[ i ];
0885:     }
0886:
0887:     // We should always get a number back from opacity
0888:     if ( name == "opacity" && ret == "" )
0889:       ret = "1";
0890: