Patch for jQuery ticket #1954

ie7-button-value.patch

diff --git a/src/attributes.js b/src/attributes.js
index fec1323..86b1e60 100644
--- a/src/attributes.js
+++ b/src/attributes.js
@@ -31,7 +31,11 @@ jQuery.fn.extend({
 		return this.each(function(){
 			jQuery.attr( this, name, "" );
 			if ( this.nodeType === 1 ) {
-				this.removeAttribute( name );
+				if ( name === "value" && jQuery.nodeName( this, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+					this.removeAttributeNode(this.getAttributeNode( name ));
+				} else {
+					this.removeAttribute( name );
+				}
 			}
 		});
 	},
@@ -206,6 +210,10 @@ jQuery.fn.extend({
 					return elem.getAttribute("value") === null ? "on" : elem.value;
 				}
 
+				if ( jQuery.nodeName( elem, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+					return elem.getAttributeNode( "value" ) ? elem.getAttributeNode( "value" ).nodeValue : undefined;
+				}
+
 				// Everything else, we just grab the value
 				return (elem.value || "").replace(rreturn, "");
 
@@ -252,6 +260,17 @@ jQuery.fn.extend({
 					this.selectedIndex = -1;
 				}
 
+			} else if ( jQuery.nodeName( this, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+				var attributeNode = this.getAttributeNode( "value" );
+
+				if (attributeNode) {
+					attributeNode.nodeValue = val;
+				} else {
+					attributeNode = document.createAttribute("value");
+					attributeNode.nodeValue = val;
+					this.setAttributeNode(attributeNode);
+				}
+
 			} else {
 				this.value = val;
 			}
@@ -318,7 +337,22 @@ jQuery.extend({
 
 					if ( value === null ) {
 						if ( elem.nodeType === 1 ) {
-							elem.removeAttribute( name );
+							if ( name === "value" && jQuery.nodeName( elem, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+								elem.removeAttributeNode(elem.getAttributeNode( name ));
+							} else {
+								elem.removeAttribute( name );
+							}
+						}
+
+					} else if ( name === "value" && jQuery.nodeName( elem, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+						var attributeNode = elem.getAttributeNode( name );
+
+						if (attributeNode) {
+							attributeNode.nodeValue = value;
+						} else {
+							attributeNode = document.createAttribute("value");
+							attributeNode.nodeValue = value;
+							elem.setAttributeNode(attributeNode);
 						}
 
 					} else {
@@ -331,6 +365,10 @@ jQuery.extend({
 					return elem.getAttributeNode( name ).nodeValue;
 				}
 
+				if ( name === "value" && jQuery.nodeName( elem, "button" ) && jQuery.browser.msie && parseInt(jQuery.browser.version, 10) <= 7 ) {
+					return elem.getAttributeNode( name ) ? elem.getAttributeNode( name ).nodeValue : undefined;
+				}
+
 				// elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set
 				// http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/
 				if ( name === "tabIndex" ) {